Lithium Hexamethyldisilazide → 7-bromo-N-cyclopropyl-N-(4-methoxybenzyl)-2-(methylthio)imidazo[2,1-f][1,2,4]triazin-4-amine

참여 물질

반응 조건

반응 단계

To a 25 mL flask was added a mixture of 7-bromo-2,4-bis(methylthio)imidazo[2,1-f][1,2,4]triazine (2.0 g, 6.87 mmol), N-(4-methoxybenzyl)cyclopropanamine (1.34 g, 7.56 mmol) in anhydrous THF (20 mL). The reaction solution was cooled to −78° C. and treated dropwise with 1.0 M lithium bis(trimethylsilyl)amide in THF solution (20.61 mL, 20.61 mmol, 3 eq, 1M solution in THF). The reaction was stirred at −78° C. for 1 hour, then allowed to come to room temperature and stirred for 3 hours The reaction was quenched with saturated ammonium chloride. The product was extracted with ethyl acetate, the organic layer was dried with sodium sulfate and concentrated in vacuo. The crude product mixture was purified via ISCO (0-100% of ethyl acetate/heptane in 10 minutes, 24 g silica column) to give the pure product 7-bromo-N-cyclopropyl-N-(4-methoxybenzyl)-2-(methylthio)imidazo[2,1-f][1,2,4]triazin-4-amine (2.1 g)

출처 및 근거